Manufacturing Solutions

Line Design

Line Design

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Line Design

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The Line Design panel allow you to create and modify lines by several methods.

You can access the Line Design panel by clicking on Mesh > Line Design.

The following subpanels are available from the Line Design panel:

by nodes

Create lines from nodes, with or without projecting the line to the binder surface

section cut

Cuts planar sections through elements, surfaces, or lines

offset

Creates lines offset from a line or offset from one line toward a target line

projection

Projects line onto a surface

part boundary

Creates a mesh boundary line around selected elements

control point

Modifies line data by moving selected points on a line

 

 

How do I...

expand-green-10Create a line from nodes
1.Select the by nodes subpanel.
2.Pick the nodes to use to create the line.
3.Click the switch and select the type of line you want to generate.  (See Comments.)
4.Click the toggle to select the binder surface, if it exists.  If selecting w/ binder, click the surf button and select the surface.
5.Click create.

 

Undo

Click reject immediately after you create a line.  To reinstate a rejected line, click create again without changing any of the input data.

 

Comments

The different types of lines are linear, standard, smooth and controlled.

Linear

Creates a straight line segment between each of the input nodes.

Standard

Performs point reduction before creating a line with the following parameters used in the criteria below (the break angle being set to 150.0 degrees, the aspect ratio being set to 5.0, and the linear angle being set to 179.0 degrees) which produces reasonable results for most lines.

Smooth

Creates a smooth line which runs though each of the nodes selected.

Controlled

Performs point reduction before creating a line with the parameters specified in the menu panel.

break angle =

specifies the minimum angle allowed between three points in a line.  If the angle between a point and the two adjacent points is less than the angle specified, HyperMesh will consider this point to be a point of discontinuity in the line and place a joint (will start a new NURBS) at this location.

aspect =

specifies the maximum ratio allowed for the distance between a point and the previous point in the line and the distance between the same point and the next point in the line.  If the ratio of the distance between the two adjacent segments exceeds the aspect ratio defined, HyperMesh places a joint between the segments.

linear angle =

defines the angle at which HyperMesh should consider a line straight.  For example, if the line angle between three consecutive points along the line is greater than the linear angle specified, HyperMesh will remove the center point from the line.

 
expand-green-10Create a section cut
1.Select the section cut subpanel.
2.Choose the entity (elements, surfaces, or lines) where you want to create the section.

If you are using lines:

•Use the plane and vector collector to define the cutting plane for a group of lines.  The plane must be defined first.
•Click the toggle to select smooth or linear as the type of line created by the section cut.
•Click line list and select a series of lines, in the appropriate order, that comprise the section being created.

After you select each line, a "phantom line" showing the section being created is displayed on the screen.

•After you select all of the lines to be included in the section cut, click create to create the line representing the section.

If you are using surfaces:

•Select the plane or the surface that you want the section to intersect.

If you are using elements:

•Select the plane and the elements that you want to section.  (Depending on the break angle, the section is divided into line segments. If you want to combine the lines, toggle line segments and increase the break angle as required.)

 

Undo

Click reject immediately after you create the section.

 

Comments

You can click the right mouse button to reject the last line you selected while the "phantom line" is being created.

If multiple intersections are found, HyperForm asks you to indicate which intersection to use.  

 
expand-green-10Line Offset
1.Select the offset subpanel.
2.Pick the line to be offset.
3.Set the toggle to rolling cylinder or parallel planes.
4.Click on the binder surface onto which the line should be projected.
5.Click offset+.

 
expand-green-10Offset lines a specified distance toward another line using the translate option
1.Select the offset subpanel.
2.Set the toggle to the translate option.
3.Click the upper line collector and pick the line to be offset.
4.Click the lower line collector and pick the target line toward which to offset the initial line.

HyperForm first creates an equal number of points on the initial and target line.  The new line is constructed from points created at the specified offset value on vectors between those points on the initial and the target line.

5.To create the line without projecting the line to the binder surface, set the toggle to the w/o binder option.
6.If you want to project the line to the binder surface, set the toggle to the w/binder option and select the binder surface.
7.Use the plane and vector collector to specify the direction in which to offset the line.

The line is offset and then translated in the specified direction.

8.Click create.

 
expand-green-10Offset lines on a binder using the on binder option
1.Select the offset subpanel.
2.Set the toggle to the on binder option.
3.Pick the line and binder surface.
4.Click create.

HyperForm projects the line to the XY plane, then offsets and projects the line to the binder surface.

Note:To obtain the offset line as a convex hull, use the convex hull option.

 
expand-green-10Project lines
1.Select the projection subpanel.
2.Pick the line you want to project, or click line and specify the line ID.
3.While surfs is highlighted, pick the surface to which you want to project the line.
4.Use the plane and vector collector by along: to specify the plane along which to project the line.
5.Click project.

 

Undo

Select reject immediately after projecting the line.

 
expand-green-10Create a part boundary line
1.Select the projection subpanel.
2.Pick the line you want to project, or click line and specify the line ID.
3.While surfs is highlighted, pick the surface to which you want to project the line.
4.Use the plane and vector collector by along: to specify the plane along which to project the line.
5.Click project.

 

Undo

Select reject immediately after projecting the line.

 
expand-green-10Modify a line by moving control points
1.Select the control point subpanel.
2.Pick the line to modify.
3.Click N1 and pick the initial point of the range.
4.Click N2 and pick the ending point of the range.
5.Click handle and pick a node as the control point.
6.Click the toggle to keep shape or new interpolation.
7.Enter the change in distance, dx, dy, and dz in the fields dx =, dy =, and dz = or specify a target node.
8.Click create.

 

Undo

Click reject.

 

 

See also

Alphabetical List of Panels